Home / 1,021.10-1,531.19-290.51

Finding the Fourth Proportional to 1,021.10, 1,531.19 and 290.51

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Solution

The fourth proportional to 1,021.10, 1,531.19 and 290.51 is: 435.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.10 : 1,531.19 = 290.51 : x
  2. Step 2: Convert to fraction form
    1,021.10/1,531.19 = 290.51/x
  3. Step 3: Cross multiply
    1,021.10x = 1,531.19 × 290.51
  4. Step 4: Simplify right side
    1,021.10x = 444,818.35
  5. Step 5: Solve for x
    x = 444,818.35/1,021.10
  6. Step 6: Final answer
    x = 435.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.